19. Respiratory Adaptations Flashcards
1
Q
What is the partial pressure of inspired O2 at room conditions?
A
149.7 mmHg
2
Q
What is the equation for PaO2, given PaCO2 at room conditions?
A
PaO2 = 149.7 mmHg (inspired O2) - PaCO2/RQ (usually .8)
3
Q
What occurs as a result of a decreased V/Q ratio?
A
O2 drops and CO2 rises
(in the blood)
4
Q
Why might we see low CACO2 levels at altitude?
A
The low oxygen tells the peripheral chemoreceptors to fire, telling you to breathe more. This results in lower CO2
5
Q
How deep do you have to go (diving in water) for the barometric pressure to increase 1 atm?
What is the barometric pressure at 30 meters?
A
10 meters
4 atm (3 + 1 for the surface pressure)
6
Q
What is the water vapor pressure at body temperature?
A
47
7
Q
What is the pressure of air at sea level?
A
760 mmHg
